Philips TW0200 User Manual

Page 32

7-2.4 HOP A/T OF 11 GHz 140 Mbps or STM-1
1] Receive level: - Note down Surveyed level, Nominal level and measure Rx RF level
at Rx IN by power meter with suitable sensor and pad by removing the W/G from RF IN.

- The same Rx RF level can be

easured with calibrated spectrum analyzer and by

een surveyed and nominal level should be within ±3 dBm.

f provided) which should

and at Mon skt Limit -10 dBm.

this is for

refe n
3] Group delay and IF response:- See Fig. 7-15

tim

ngular frequency.

l station MOD off.

r at other end

tuning the required frequency of a channel, deviation between measured and survey
should be within ±1 dBm.

- The deviation betw

As per the test schedule of DOT ML section..

ain and Protection channel with ATPC ON ,

- Measure Rx level on all M
(If provided)

rization (i

- Measure Rx level at RF Rx IN due to X- Pola

an -30 dBmo from measured RF level or better.

be Better th

sure IF level at AGC out. Limit is -5 ± 1 dBm

asu e AGC voltage at connector M-69 pin 1-8, reading may be -6.0 V,

re ce only.

It is the transit time delay effect. The transit time for a transmission path is a

or current to travel through the transmission path. This

e required by a specific voltage

time is given by the rate of phase shift & a
Ta

ke est in MGC (Manual Gain control) only, keep al

MLA Transmitter at one end MLA receive

Front
- Blinking O

- Counter -PLL out frequency high
- P chose frequen

T Tr

- Auto at 83.5 KHz -Threshold EXT Off
- IF (BB frequency) - EXT/Line selector
Line marker selector
Received CF – 70 MHz
Sweep width – Type A ± 10 or Type B ± 6 or ± 9.5 as per system, Adjust IF to -3 F = 200
KHz rms, BF= 250 MHz
Y1=

ent 200 KHz deviation, Sweep ±10 or ±6 MHz, 7 MHz and 250 KHz BF,-3.0

itter at IF in

conditions

Rear

N -BB select NML

- X select IF -Character ON

-P

cy -CR

ace CM O/

IF Amp1.87dB P-P,

Y2 = Delay 16.1 nanosec. P-P

- S

dBm from MLA Transm
- Distance station will receive on display.

Sweep shows 0.00MHz. Adjust AGC and MGC

for -3 dBm and then from MSA generator.

- When IF is through

193

-3

P-P

I/P

IF O/P

IF IN on

Transm

Fig. 7-15

itter

183